Some of you may have noticed the Aries incubator project at Apache: http://incubator.apache.org/aries.
Aries is about building a community specifically around enterprise OSGi components and an enterprise OSGi application programming model. It provides a home for bundles and larger chunks of enterprise OSGi technology independent of the OSGi container, so anything found in Aries should work in a compliant OSGi runtime such as Felix or Equinox.
Part of the proposal focuses on the development of an OSGi Application model for assembling multiple bundles into a larger parts which you can think of as an application.
An application model is one of the things that the OSGi Enterprise Expert Group (EEG) is currently defining and working ahead on an implementation will help making this standard better as experience is always better gained by doing.
Initially the project will provide an implementation of the OSGi 4.2 Blueprint specification (RFC 124), an implementation of JPA support for OSGi and JNDI integration for OSGi.
Like with any Apache project, anyone interested in joining the fun is more than welcome to contribute! Many individuals and people working for a large variety of companies have already joined during the proposal stage and I would expect even more people to join once the project is under way.